You would like to abbreviate commands such as Layer, Chprop, AI_MOLC and more with simpler one, two or three letters for quicker typing or macro writing.
These are called Aliases, and you can create them by editing LT's PGP file and adding or deleting what you need as you need it. To access the file, click on LT's Tools Pulldown Menu, Customize selection, Edit Program Parameters.
You will be presented with a new pop-up, scroll down and match exactly the format to add your own abbreviations/Aliases:
When you are done, save and close this file. At the LT command line, type REINIT, select PGP File from the new pop-up, then click OK: this reloads the PGP file you just edited. Your changes are now available for use.